/* quit.h -- How to handle SIGINT gracefully. */
-/* Copyright (C) 1993 Free Software Foundation, Inc.
+/* Copyright (C) 1993-2013 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
- Bash is free software; you can redistribute it and/or modify it under
- the terms of the GNU General Public License as published by the Free
- Software Foundation; either version 2, or (at your option) any later
- version.
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bash is distributed in the hope that it will be useful, but WITHOUT ANY
- WARRANTY; without even the implied warranty of MERCHANTABILITY or
- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- for more details.
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with Bash; see the file COPYING. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
#if !defined (_QUIT_H_)
#define _QUIT_H_
-/* Non-zero means SIGINT has already ocurred. */
-extern int interrupt_state;
+#include "sig.h" /* for sig_atomic_t */
-extern void throw_to_top_level ();
+/* Non-zero means SIGINT has already occurred. */
+extern volatile sig_atomic_t interrupt_state;
+extern volatile sig_atomic_t terminating_signal;
-/* Macro to call a great deal. SIGINT just sets above variable. When
- it is safe, put QUIT in the code, and the "interrupt" will take place. */
-#define QUIT if (interrupt_state) throw_to_top_level ()
+/* Macro to call a great deal. SIGINT just sets the interrupt_state variable.
+ When it is safe, put QUIT in the code, and the "interrupt" will take
+ place. The same scheme is used for terminating signals (e.g., SIGHUP)
+ and the terminating_signal variable. That calls a function which will
+ end up exiting the shell. */
+#define QUIT \
+ do { \
+ if (terminating_signal) termsig_handler (terminating_signal); \
+ if (interrupt_state) throw_to_top_level (); \
+ } while (0)
+
+#define CHECK_ALRM \
+ do { \
+ if (sigalrm_seen) \
+ longjmp (alrmbuf, 1); \
+ } while (0)
#define SETINTERRUPT interrupt_state = 1
#define CLRINTERRUPT interrupt_state = 0
#define ADDINTERRUPT interrupt_state++
#define DELINTERRUPT interrupt_state--
+/* The same sort of thing, this time just for signals that would ordinarily
+ cause the shell to terminate. */
+
+#define CHECK_TERMSIG \
+ do { \
+ if (terminating_signal) termsig_handler (terminating_signal); \
+ } while (0)
+
+#define LASTSIG() \
+ (terminating_signal ? terminating_signal : (interrupt_state ? SIGINT : 0))
+
+#define CHECK_WAIT_INTR \
+ do { \
+ if (wait_signal_received && this_shell_builtin && (this_shell_builtin == wait_builtin)) \
+ longjmp (wait_intr_buf, 1); \
+ } while (0)
+
+#define RESET_SIGTERM \
+ do { \
+ sigterm_received = 0; \
+ } while (0)
+
+#define CHECK_SIGTERM \
+ do { \
+ if (sigterm_received) termsig_handler (SIGTERM); \
+ } while (0)
#endif /* _QUIT_H_ */